Recrystallisation Behaviour of an Fe-Mn-C-Si-Al TWIP

Abstract

The static recrystallisation behaviour of cold rolled and annealed TWinning Induced Plasticity (TWIP) steels is important for its industrial production. The recrystallisation kinetics have been determined for an Fe-Mn-C-Si-Al TWIP steel using hardness measurements and microstructure analysis: it has been shown that recrystallisation progresses rapidly with increased annealing temperature. Recrystallisation was faster at higher cold reductions, and a smaller final grain size was observed at lower annealing temperatures. This indicates that the mechanism is nucleation dominated at lower temperatures; grain growth at higher temperatures appears similar for all reductions. The recrystallisation results in a crystallographic texture where the main components of the cold rolling texture are preserved in the final texture after annealing, although some randomisation was observed.

Microstructure and Texture Evolution during Recrystallization of a Fe-Mn-C Alloy

“…Most research studies of Fe-Mn-C alloys mainly concentrated on texture and microstructure evolution during deformation [1][2][3][4][5][6][7] and the effect of stacking fault energy on ε-martensite formation and/or mechanical twinning [8][9]. On the contrary, the recrystallization behavior of cold-rolled Fe-Mn-C alloys has only been sparsely investigated [5,[10][11][12][13][14][15][16]. In the present work, microstructure and texture evolution in a Fe-Mn-C alloy during recrystallization were studied.…”

Fe–Mn–C–Al Low‐Density Steel for Structural Materials: A Review of Alloying, Heat Treatment, Microstructure, and Mechanical Properties

“…Therefore, the effect of aging treatment on Fe-Mn-C-Al steel phase decomposition will be considered later. Moreover, the addition of other alloying elements, such as Nb, [46] Cr, [47] and Si, [48] into Fe-Mn-C-Al lowdensity steel has been reported to influence the phase composition. Nevertheless, the mechanism of alloying effect on the phase diagram needs further investigation.…”